Double oppositely-disposed valve.



A. R. TRIST.

DOUBLE OPPOSITELY DISPOSED VALVE.

APPLICATION FILED MAR.15, 1913.

Patented Mar. 30, 1915.

ATT Y.

THE MORRIS PETERS C0., PHom-Llrxu.. WASHING YON. D. C

ARTHUR RONALD TRIST, OF LONDON, ENGLAND.

i DOUBLE OPPQSITELY-DISPOSED VALVE.

Specification of Letters Patent.

Patented Mar. 3G, 1915.

y Application filed March 15, 1913. Serial No. 754,500.

To aZZ whom it may concern: Y

Be it known 'that I, ARTHUR! Ronnnn Tinsi, subject of the King of GreatBritain and Ireland, residing at London, England,

have invented new and useful Improvements in and Relating to DoubleOppositely-Disposed Valves, of which the following 1s a specification. Y

This invention relates to double oppositely disposed valves used for thepurpose of .controlling the flow of liquid from two directions into athird direction and has many applications in the arts and sciences whichneed not be herein detailed, but by way. of example it may vbe statedthat the invention is .particularly applicable to devices s uch as feedregulators for steam boilers which are controlled as to their action bythe admission of steam to and the exhaust of steam from the controllingdevice. In devices of this nature the adjustment of such Vdouble valvesrelative to their seats has to be very accurately made and to have theirlift of a very small amount, otherwise the efcient working of thedevice, which the .said valveA controls, cannot be effected within thenarrow limits which ordinary circumstances demand. It often happens thatdevices of this nature which have been initially adjusted to fulfiltheir functions properly by the manufacturers before delivery and whenerected carry out such functions 'satisfactorily, are subsequentlyinterfered with by the attendants by which their efficiency 1simmediately impaired, and it becomes necessary to send ajskilled workman1n order to 11e-adjust the valves to their proper position. Thiscondition of things ofter arises when the valves leak from any cause andefforts are made to grind them in. In such case it is found to be farpreferable to make the whole device as a separate entity so that the oldone may be taken out and discarded and the new one be inserted in itsplace, which can be effected with a proper form of containing valve boxin two or three minutes.

My invention consists in the formation of a double valve and seatingsop'positelydisposed and initially and permanently adjusted as a separateentity so as to comply with the conditions hereinbefore set out.

In order that the invention may be the better understood, I will nowproceed to describe the same in relation to the accompanying drawings,reference being had to the letters and gures marked thereon.

. Like letters refer to like parts in the various figures, in whichFigure 1 is an outside view of a double valve with seatings constructedin accordance with my invention. Fig. 2 is a sectional view of a valvebox having my invention installed therein. Figs. 3 and 4: are partsectional views of one method of locking the adjustable valve on itsstem before such locking is effected, the latter being a section on theline l-l of Fig. 3. Figs. 5 and 6 is a similar view after such lockinghas been effected, the latter being a section on line 2 2 of Fig. 5.

The body a has a central aperture Z2 with a valve seat c and CZ at theupper and lower ends respectively, and has also communicating passages dleading through the side wall to the exterior, provision being made inthe form of a groove e so as to have an annular passage around the bodya when insertedin the valve box f. The body a has faces g and necks habout which washers z' can be placed so as to support and formhermetical oints when mounted in the valve box f and submitted tojointing pressure by means of a screw y' or other equivalent device. Onevalve Za has a stem Z which is screwed at the upper end, and on to whichis screwed the valve m provided with a tapped hole. The adjustment ofthe valve 7c to the valve m can be made by screwing the valve m more orless upon the stem Z. Through the valve m is provided a transverse holen somewhat larger in diameter than the diameter of the screwed stem Zand when the final adjustment of the valves Za and m relative to theirseats CZ and c re spectively the stem Z is deformed from its circularsection as shown in Fig. 4 into a square section as shown at o in Figs.5 and 6 so as to lill up the transverse hole n and thus lock the twovalves lc and m perma: nently, so that no further adjustment ispossible. If such adjustment is attempted the only result is that thestem Z will be twisted and probably fractured.

In order to prevent the valves 7c and 'm from being turned while inaction the valve m, is provided with a slot p at its upper end withwhich engages a transverse pin g loosely mounted in a hole 1^ in thevalve box. The gear operating valve can be connected v by a connectingrod s to the lower valve lo i as shown 1n Fig'. 2 or 1n any otherequiva-j lent manner.

Although I have described the means of assembly by means of a screw andthe locking effect by means of the deformation of the circular stem itis obvious that other equi-valent means of adjustment and permanentlocking could be effected without departing from the essence of thisinven-Y tion.

Having thus fully described my invention, I claim as new and desire tosecure by V Letters Patent 1. A double valve and valve seat unitary lelement, consisting of, in combination, a

valve box having connecting means for a `fluid pressure medium, a bodyhaving a valve seat on each side oppositely disposed, means on said bodyfor supporting said body at both top and bottom sides in an hermeticallyjointed manner with the said valve box, means of ycommunication from thecenter of said body to the exterior through the side walls thereof, onevalve having a kvalve stem, another valve oppo# sitely disposed to the`first valve Von said Copies of this patent may 'oe obtained for 2. AVdouble valve and valve seat unitary element consisting of, incombination, a valve box having connecting means for a fluidpressuremedium, a body having a valve seat on eachside oppositely disposed,means on said body for supporting said body both at top and bottom sidesin an hermetically jointed manner within a valve box of suitablel form,exit'means of communication from the center of said body to the exterior`through the sidewall thereof, one valve having a valve stem screwed atits end, another valve oppositely disposed to the firstA valve andhaving ar tapped hole so as to be screwed on to said stem, a holethrough the second valve transverse to its axis, the axis `of the saidtransverse hole intersecting the axis ofthe screwed stem at f rightangles, the said transverse hole being of larger diameter than the saidscrewed stem, and a symmetrical enlargement on the screwed stem to fillsaid transverse hole at Athe center formed by deforming the screwed stemafter the relative Vadjustment of the valves and their seats in acoaxial manner has been lfinally made so that such adjustment is finallyand V"permanently locked, substantially as described.

In testimony whereof I have signed O. J. WORTH.

presence of ve cents eachLby addressing theifcommissioner of Patents',

WashngtolnRC." j l

